GC2 Incorrect distance 20% short

[Blaiz]

Hi to everyone at Golf Simulator Forum,

This is my first post and my first new topic, I think I should probably start by explaining the situation hopefully I'm not too long-winded.

I'm originally from Canada but now living in Phuket Thailand for the past 20 years. I'm a long-time golfer currently a 4 handicap but have been as low as scratch. I have being dreaming of having my own golf simulator in my house mostly for game improvement reasons. After a lot of research online I decided to go with the GC 2 for its accuracy and portability. After a lot of research I found some good deals with 2nd swing on eBay and made the purchase.
I was traveling in America and picked up the unit took it back to Thailand with me and set everything up in my room. Obviously very easy to set up this machine but was immediately disappointed as all of my distance was seen to be 20% shorter than they were normally. As a long time golfer I know my distances very well and uncannily they were nearly exactly 20% short every time. This was the same with every type of golf ball and two other golfers that I tested.
I am getting great service from 2nd swing and they are perplexed at the situation I'm not sure of their knowledge though. But they are trying to help in fact they sent me a new flash bulb for the machine just tried it today and disappointingly I am getting the same results.

I'm a bit at a loss to figure out what's going on, my understanding is there is no calibration on this system also I am aware that I've purchased the system on the other side of the planet 2nd hand I'm not sure if that makes any difference.
I am using the system right now at sea level and very high humidity on this island.
The system was purchased from Minnesota I'm assuming it was tested there as well before it was sold second hand.

I've been reading through these forums, as I don't want to ask questions that have already been answered. There is a ton of extremely knowledgeable people here and I'm so grateful to find this information source. It's very difficult for me to send the unit back for repairs or get replacement units sent to me from the place I bought it as I'll have to deal with a very difficult customs and duty system here in Thailand if you know what I mean. I'm trying to avoid that and solve it on my own hopefully someone here in these forms can give me a heads up on a simple solution or at least something that I can apply a patch to.

Thanks for any help hopefully I'll be able to contribute and help others in this forum in the future. Thank you

Just some more basic info

Boot Version1.6
Firmware 3.7

[Dax]

I recall a very extensive discussion on this topic for a few people on another forum that spoke to this issue. Can't recall what the resolution was, but there were a lot of tips that you could try. I also recall seeing some found issues in using certain types of mats and for others the unit was not at the same level as the Mat I believe. I'm not sure I can provide the name of the other forum ere but would be happy to share if you PM me. However, I suspect some of the users here could provide some insight as well.

[Dax]

Just sent you some PMs

[Blaiz]

Thank you very much Dax for your help and your PMs I am a bit new to this forum and I am having trouble finding the topics you were mentioning in both your replies and the PMs you sent me. I only had 30 minutes to have a look before i am off to work but couldn't manage to find what you were directing me to.

I do want to say though thank you very much for your efforts and apologize for my newbeeness

[Blaiz]

I am a bit desperate here and am going to have to do something other than adding 20% to my yardages lol. I am connecting the unit via blue tooth to my android table and using the Foresight Performance Fitting app but the unit continually is disconnecting on/off.

I am considering moving back my firmware version to the 3.5.1.0 from the 3.7.0.0 I am currently on, anyone think this might be a good idea? I can't find either of these firmware versions anywhere to download though. I am getting very concerned with my choice of the Foresight company, there software and firmware so far has done little to impress. Was planning on dropping some of my hard earned on the courses as well but now am reconsidering of course.

Anyone know where I can download firmware, possibly a link or something?

[Blaiz]

I recall a very extensive discussion on this topic for a few people on another forum that spoke to this issue. Can't recall what the resolution was, but there were a lot of tips that you could try. I also recall seeing some found issues in using certain types of mats and for others the unit was not at the same level as the Mat I believe. I'm not sure I can provide the name of the other forum ere but would be happy to share if you PM me. However, I suspect some of the users here could provide some insight as well.

I have tried 3 different mats and all sorts of lighting, balls, angles heights etc there all identical as far as my testing, but thanks for your thoughts Dax.

[Menace]

This may sound silly, but did you contact Foresight? If this has been discussed on another forum it means you're not the only one and Foresight might have a solution for it.

http://www.foresightsports.com/contact-support

[Bubba22]

GC2 issues has been discussed both here and on other forums. Post some screenshots of your data, including the driver, woods and long/short irons. No system is perfect and even the GC2 can have issues. It all ranges from indoor swing vs outdoor swing, mat issues, spin issues, flash issues etc. Give us more info to help. Always contacting Foresight is a good start.

[Bubba22]

Here are some suggestions:

1A. make sure that the gc2 is placed a) level with hitting surface, or b) 1 inch no more than 2 inches above hitting surface. If its lower it will produce short carries all the time. This is straight from the partner Jon Watters VP - not in the setup sheet though.

1B - very important make sure under options that the "wait for spin" setting is checked. You can test with it on or offto see any difference.

2. post info for the worst behaving clubs but also include the data on #3 below. without can't really determine purity of impact.

3. Use impact tape to test 5 swings each club and note the data from the launch monitor and tape impact
* also note for each one where it hit vertically and horizontall relative to the sweet spot - ie on, 1/4 off, 1/2 inch off, way off
* this test helped show that a lot of off center hits verified by tape caused big drops in distance
* as you do this you will see that when you pure it dead center it should carry longer than your average and when you are slightly off hit your average and way off fall way short.
* important to do this because if you find that your pured shots on the sweet spot are way short then there is a problem with the device if its above the surface you are hitting from

4. i know stupid but just a reminder before measuring -
a) stretch, b) ~10 practice swings no balls, ~10 swings with balls
b) it takes my body time to realistically get to my swing speed consistently

5. are you located in an exceptionally high or low elevation?

6. if you are swinging indoors do you have plenty of room to feel like you go all out?
* when I was first asked that I was insulted but I do think its true depending on the indoor setup we do adjust our swings slightly if not careful

7. assume your average baseline carries are measured on the course via a range finder like bushnell 1500 or something equivalent or even outdoor trackman versus walking it off or estimating?

8. what kind of mat are you hitting off of?

[Ronsc1985]

There is only a need to level the GC2 once. You then use the tilt calibration tool to store the unit offsets. Since you have transported the unit half way around the world it is quite possible the on board accelerometers need recalibration. Get a high quality level and some shims. You then level the device in all three planes and run the tilt calibration tool. This will store the offsets in the GC2 so when you don't have the unit exactly level it will know how crooked it is relative to level and automatically correct the measurements.

I have no idea if this is your problem but if you don't have it calibrated then it is unrealistic to expect accurate computations. Actually level calibration routines are quite common in precision accelerometers.

Once you get it working correctly it won't hurt anything to run the tilt calibration tool every now and then in case the unit has acquired some long term drift.

[Blaiz]

I am off to get data Thanks Bubba I will follow your instructions to the tee, I appreciate your time and effort. (I will say that i completely understand all of the suggestions you are giving me regarding human error coming into play I can tell you though I have been playing these Mizuno MP 32s for over 10 years and on the range or course barring the elements impacting the ball I can tell within a yard my distances and have used many including the Bushnell 1500 to verify this. I think you have given me some great advice here though to further narrow the chance of golfer swing error. I am confident it is not a swing issue.

Below in line I have added some answers before I go testing and back with the data in a few days.

Here are some suggestions:

1A. make sure that the gc2 is placed a) level with hitting surface, or b) 1 inch no more than 2 inches above hitting surface. If its lower it will produce short carries all the time. This is straight from the partner Jon Watters VP - not in the setup sheet though.

1B - very important make sure under options that the "wait for spin" setting is checked. You can test with it on or offto see any difference.
I cannot find this option on my GC2 I am using firmware 3.7.0.0 but there is no "wait for spin" option or at least I cannot find it.

2. post info for the worst behaving clubs but also include the data on #3 below. without can't really determine purity of impact.

3. Use impact tape to test 5 swings each club and note the data from the launch monitor and tape impact
* also note for each one where it hit vertically and horizontall relative to the sweet spot - ie on, 1/4 off, 1/2 inch off, way off
* this test helped show that a lot of off center hits verified by tape caused big drops in distance
* as you do this you will see that when you pure it dead center it should carry longer than your average and when you are slightly off hit your average and way off fall way short.
* important to do this because if you find that your pured shots on the sweet spot are way short then there is a problem with the device if its above the surface you are hitting from

4. i know stupid but just a reminder before measuring -
a) stretch, b) ~10 practice swings no balls, ~10 swings with balls
b) it takes my body time to realistically get to my swing speed consistently

5. are you located in an exceptionally high or low elevation?
I am located right at sea level in a very humid climate Phuket Thailand

6. if you are swinging indoors do you have plenty of room to feel like you go all out?
* when I was first asked that I was insulted but I do think its true depending on the indoor setup we do adjust our swings slightly if not careful
I have gone every way but upside down

7. assume your average baseline carries are measured on the course via a range finder like bushnell 1500 or something equivalent or even outdoor trackman versus walking it off or estimating?
I have exact yardage on my shots

8. what kind of mat are you hitting off of?
Its a plain jane matt HOWEVER ! I have tried 3 different mats of varying quality but ALL three have a white parallel alignment line, tomorrow i will try a plain green mat. This may be the issue however I do not hit the ball off the line., made me think thanks. its similar to the below image without the practice equipment(mat only)

[ATTACH=CONFIG]n39070[/ATTACH]

Thanks again

[SFR]

Could you take the unit to a driving range and just hit a few balls and record the ball speed, LA, spin numbers and carry. Record a few of those and then we can compare at least your ball speed numbers to ours and compare carry. If not outdoors then off your indoor setup. With out doors you can at least compare carry to the real carry as long as there is not a major wind.

[Blaiz]

Thank you all so much for the help taking your advice and going to get back to you thank you again. Regarding the tilt calibration tool can I get some more information on that? I'm really unfamiliar with what you're referring to. Also I'm still a bit confused about the option and whether or not it's in my firmware for the wait for spin option where is that and where can I locate it? Thanks again everyone very helpful

Sent from my Huawei Honor 7 using Tapatalk

[Ronsc1985]

Wait for spin is a parameter you can select in game options of the simulation software. It sound like you just have the launch monitor itself and not the associated software. If so you do not have a need for wait for spin as this is only a control to delay the presentation of the ball flight until the spin is calculated during an on screen simulation as in playing a course or at a practice location.

The tilt calibration tool came with the system when I bought it used. It was provided by Foresight Sports. When I bought the system the previous owner contacted Foresight to transfer the unit from him to me.. Foresight then provided all the necessary software and firmware changes to me via the internet. The program is an .exe file which you run when you want to do the calibration. If you can't get a copy from Foresight maybe someone on this forum can send you the program. I have no idea if the program looks for the serial number of your unit. If so then getting one from someone other than Foresight would be useless.

If your unit is not registered with them they may or may not provide the necessary help, I don't know how they operate.

[Js1010]

I have the tilt calibration software - it does not ask for any sort of serial number. Just need to make sure the gc2 is on a flat surface and then run the software.

If you PM me your email i will send it to you.

Not sure if this is your issue with distance but when i first got my gc2 i thought it was short as well. But it turns out i wasnt swinging like i I do outdoors. Took me some time to get used to swinging indoors. I would takes some pics of your unit showing some shot data so we can see the numbers and see if anything seems off.